- 10x magnifications allows for the steadiest images possible and 50mm objective lens provides maximum light transmission 
<br /> - The rubber-armored body secures tight grip in rugged conditions.They are nitrogen filled to prevent internal moisture and O-ring sealed for 100% waterproof protection.
<br /> - O-Ring Sealed for complete waterproof protection
<br /> - BAK-4 prisms for crisp images and high quality optics for increased clarity
<br /> - Dry Nitrogen-purged and sealed to prevent foggin,clouding and moisture damage
<br /> - Ideal for all outdoor activities in all weather conditions
<br /> - Non-slip and ergonomic rubber design for a secure grip
<br /> - Specially designed for nautical use
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<br />10x50 Waterproof, Battalion, with Internal Rangefinder & Directional Compass, Designed to meet military standards, 
<br />100% Waterproof and fogproof, Fully multi-coated optics, BAK-4 prisms, 
<br />Individual eyepiece focus, Fold down eyecups, Attached lens covers, Rubber armor covered, whether you’re ashore or on the water, this binocular is designed to perform in the most demanding conditions. 
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<br />Magnification：10X
<br />Objective Lens Dia：50mm
<br />Optical Coating：BaK-4
<br />Prism Type：Porro Prism
<br />Focus System：Individual
<br />Exit Pupil：6.8mm
<br /> Eye Relief：23mm(Long eye relief for  eyeglass wearers)
<br />    
<br />Close Focusing Distance：2.5m
<br />Field Angle：7.5 degree
<br />Interpupillary distance：56~72 mm
<br />Field of view：396 (FT/1000 yards); 132 (M/1000M)
<br />Lens coating：Fully multi-coated
<br />Resolution： ≤5″
<br />Product size：7.9x3.1x5.9 inches
<br />Weight：32oz
<br />Waterproof：Yes
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<br />NOTE:  
<br />1.Night Vision Function Means The Telescope Works Better in Weak Light Surroundings than Ordinary Telescopes, But It Does not Work in Total Darkness. If You Mind this, Pls Do Not Buy.
<br />2. Basic Waterproof Function Means the Telescope can Cope with Small Rain Drops or Water Drips but It will Get Spoiled under Massive Water Conditions.